chg: test url for proxy
chg: test url for proxy

this way the check works even if only github is whitelisted by the web proxy
SteveClement/MISP,FloatingGhost/MISP,SteveClement/MISP,MISP/MISP,FIRSTdotorg/MISP,MISP/MISP,FloatingGhost/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,FloatingGhost/MISP,MISP/MISP,MISP/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,SteveClement/MISP